description the accutek ak5321024bw high density memory module is a cmos dynamic ram organized in 1024k x 32 bit words. the mod - ule consists of two standard 1 meg x 16 bits drams in plastic soj packages mounted on the front side of a printed circuit board in a 72 pad leadless sim configuration. this configuration allows socket-mounting of large quantities of memory in applications where high density and ease of inserting ad - ditional memory are important. the operation of the ak5321024bw is identical to eight 1 meg x 4 drams. there are four cas lines and two ras lines. on each bank of 1m x 32, independent byte control is accomplished by four cas lines. each seperate cas line controls one byte of the 1 meg x 16 dram. features 1,048,576 x 32 bit organization 72 pad single in-line module standard with gold fingers, solder or tin plating optional cas -before-ras , ras -only or hidden refresh operating free air temperature 0 0 cto70 0 c single 5 volt power supply 1024 refresh cycles, 16 msec available in fast page mode or edo power: 2.0 watt max active (50ns) 1.7 watt max active (60 ns) 1.6 watt max active (70 ns) 20 mw max standby downward compatible with ak532512w and ak532256w upward compatible with ak5322048w, ak5324096w and ak5328192w additional options available 1 meg x 36 version, ak5361024bw 2 meg x 32 version, ak5322048bw 2 meg x 36 version, ak5362048bw accutek microcircuit corporation ak5321024bw 1,048,576 word by 32 bit cmos dynamic random access memory + + 72 1 + pin nomenclature a 0 -a 9 address inputs dq 0 -dq 34 data in/data out we write enable ras 0 , ras 2 row address strobe cas 0 - cas 3 column address strobe pd 1 -pd 4 presence detect vss ground vcc 5v supply nc no connect module options leadless sim: ak5321024bw leades zip: ak5321024bz pin assignment pin # symbol pin # symbol pin # symbol pin # symbol 1 vss 19 nc 37 nc 55 dq12 2 dq0 20 dq4 38 nc 56 dq30 3 dq18 21 dq22 39 vss 57 dq13 4 dq1 22 dq5 40 cas 0 58 dq31 5 dq19 23 dq23 41 cas 2 59 vcc 6 dq2 24 dq6 42 cas 3 60 dq32 7 dq20 25 dq24 43 cas 1 61 dq14 8 dq3 26 dq7 44 ras 0 62 dq33 9 dq21 27 dq25 45 nc 63 dq15 10 vcc 28 a7 46 nc 64 dq34 11 nc 29 nc 47 we 65 dq16 12 a0 30 vcc 48 nc 66 nc 13 a1 31 a8 49 dq9 67 pd1 14 a2 32 a9 50 dq27 68 pd2 15 a3 33 nc 51 dq10 69 pd3 16 a4 34 ras 2 52 dq28 70 pd4 17 a5 35 nc 53 dq11 71 nc 18 a6 36 nc 54 dq29 72 vss presence detect -50 -60 -70 pd1 vss vss vss pd2 vss vss vss pd3 vss nc vss pd4 vss nc nc
functional diagram mechanical dimensions accutek microcircuit corporation 5 new pasture road newburyport, ma 01950-4040 phone: 978-465-6200 fax: 978-462-3396 email: sales@accutekmicro.com internet: www.accutekmicro.com accutek reserves the right to make changes in specifications at any time and without notice. accutek does not assume any responsibility for the use of any circuitry described; no circuit patent licenses are implied. pre - liminary data sheets contain minimum and maximum limits based upon design objectives, which are subject to change upon full characterization over the specific operating conditions. 72 1 .750" 0.400" 0.250" 0.080" c l c l c l c l 0.125" 0.050" typ 4.250" 3.985" 0.200" max .125" dia tooling hole dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq7 dq10 dq11 dq12 dq13 dq14 dq15 a0 - a9 ras lcas ucas oe we + + + + + + + + + + + + + + + + dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq9 dq10 dq11 dq12 dq13 dq14 dq15 dq16 dq0 dq1 dq2 dq3 dq4 dq5 dq6 dq7 dq8 dq7 dq10 dq11 dq12 dq13 dq14 dq15 a0 - a9 ras lcas ucas oe we + + + + + + + + + + + + + + + + dq18 dq19 dq20 dq21 dq22 dq23 dq24 dq25 dq27 dq28 dq29 dq30 dq31 dq32 dq33 dq34 + ras 0 + cas 0 + cas 1 + ras 2 + cas 2 + cas 3 + we a0 - a9 +
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